What is Collider: Definition and 72 Discussions

A collider is a type of particle accelerator which brings two opposing particle beams together such that the particles collide. Colliders may either be ring accelerators or linear accelerators.
Colliders are used as a research tool in particle physics by accelerating particles to very high kinetic energy and letting them impact other particles. Analysis of the byproducts of these collisions gives scientists good evidence of the structure of the subatomic world and the laws of nature governing it. These may become apparent only at high energies and for tiny periods of time, and therefore may be hard or impossible to study in other ways.

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  1. B

    Large Hadron Collider questions

    I watched some interesting videos on the Large Hadron Collider (LHC) and it raised a whole ton of questions. If my questions do not make any sense, perhaps the video itself, though clever and catchy, is not credible. ( http://technology.todaysbigthing.com/2008/09/11 +...
  2. M

    Rebuilding the Superconducting Super Collider

    Hi guys, I'm new to the forums! Just recently, I became very interested in the SSC. After looking at some of the plans and details, I couldn't help but wonder why the project has not been reopened... I was thinking of possibly either: 1) Getting a nation wide petition signed to reopen...
  3. F

    Video on the Large Hadron Collider

    http://www.youtube.com/watch?v=qQNpucos9wc&feature=rec-HM-r2
  4. B

    Susskind on black hole in collider experiment

    In a video I watched, which I can't find now, Leonard Susskind briefly mentions something about scientists recently creating what seemed to be a black hole in a collider (not the LHC). He said that the scientists needed to use string theory and extra dimensions to make sense of it. Something...
  5. S

    Large Hadron Collider: Discovering Mysteries of the Universe

    A few days ago the Large Hadron Collider (LHC) was finished. Pretty rare no one started this topic. What you guys say about the LHC?? I hope they find the Higgs Boson and find a lot of the mysteries of the Big Bang and the universe. Here is the...
  6. K

    CERN's Large Hadron Collider Makes Its First Beam Circulation

    So they didn't seem to collide any particles yet? I'm not too knowledgeable about this topic, but it must be something "landmark" as Google altered their logo to inform people about this. Anyways, there's a link to the article here...
  7. D

    When Will We See Results from the Large Hadron Collider's Latest Experiments?

    http://www.lhcountdown.com/?p=13#comments The countdown is close to the end! Anyone know when we should expect results of new (or lack of) finds? I mean public announcement. A day? A week? 72 years!?
  8. H

    Critics Fear Collider Could Doom Earth

    http://news.aol.com/story/_a/critics-fear-collider-could-doom-earth/20080628165609990001
  9. T

    What are your thoughts about the Large Hadron Collider?

    I would like to hear what your thoughts are about the Large Hadron Collider they are going to fire up in August? Think were making a doom's day product?
  10. M

    Large Hadron Collider Question

    Hello All This is a question from a complete physics ingnoramus, and a quick search on google brought this forum up as a good place to start! Also, apologies if I'm in the wrong bit of the forum. Right, the question. I've been reading about the Large Hadron Collider in Cern, and it keeps...
  11. M

    Exploring the Risks of the Large Hadron Collider

    Hi, I have no academic grounding in advanced physics, but I have read a lot of the popular books on physics, and am generally interested in it. (In a couple of years that's probably what I'll learn in college). Anyway, there are people who are afraid that when the LHC goes on this summer we...
  12. malawi_glenn

    W and Z boson production and decay at e-e+ collider

    Hi! I was wondering how W+/- pairs can be created in an electron/positron collider. Does the e+e- form a Z^0 which decays to W^- W^+ ? http://www.particle.kth.se/zlab/project/Elep.gif I have found this picture, but there is no info about the mediating particle (in the small...
  13. C

    Large Hadron Collider Black Holes

    I understand that if black holes were created in the LHC, they should evaporate in 10^-100 seconds and be created at 1 black hole per second. The collider produces 10^8 collisions per second. The lifespan of a black hole increases with mass^3. I was wondering whether it would be possible for a...
  14. S

    Large Hadron Collider (LHC) Dangers?

    The highest energy particle collisions ever attempted will begin at LHC at CERN near Geneva later this year. Are there any possible risks, even at an extremely low probability, from these experiments? Could we accidently trigger something like fusion? Could micro-black holes fuse and become a...
  15. Pythagorean

    Potential Risks of the Large Hadron Collider

    Two Russian Mathematicians claim that the Large Hadron Collider (being built in Switzerland) has the potential to "tear holes" in spacetime. Here is their paper written from the http://www.mi.ras.ru/index.php?l=1" http://arxiv.org/pdf/0710.2696 Just curious on people's thoughts.
  16. P

    Capabilities of International Linear Collider and the Tesla Cavities

    I was just wondering about the International Linear Collider and the Tesla Cavities. okay as i see it they run a 9 cell cavity with a field strength of 222kW RF at 1.3 ghz and a beam current of 8.5 ma. my question is if they doubled the cavities to 18, what rf field strength would they need to...
  17. G

    Cross Section Large Hadron Collider

    Homework Statement b) The Large Hadron Collider (LHC), a 14 TeV proton-proton collider, will produce about a million Z0 per year. Explain why the cross section of such a process can be approximately written as: d\sigma / d\Omega = F_{q/p}(X_{1})F_{q'/p}(X_{2})d\sigma '(qq' \rightarrow...
  18. T

    SUSY vs Extra Dimensions: Collider Signature Differences

    Are there any signature differences between SUSY and extra dimensions ? Any papers you can link?
  19. C

    What's the Real Story Behind the Large Hadron Collider?

    Today's issue of the Science Times features a long article by Dennis Overbye on the Large Hadron Collider. It includes some pictures credited to Physics World, Sept. 2004, from which credit I presume the "particle sprays" are in fact either simulations or else do not depict ATLAS data--- my...
  20. N

    Unraveling the Mystery of a Proton-Antiproton Collider

    This is a coursework question, but i know the answer i don't understand why it's correct. "A proton antiproton collider produces a pair of top quarks, draw a Feymann diagram of this process that involves a single gluon." the answer being that 2 like quark/antiquark ( u & u bar or d & d...
  21. N

    What makes the International Linear Collider worth its high cost?

    Just read this article on the International Linear Collider http://physicsweb.org/articles/news/11/2/10/1 Looks like it's going to be a six-and-a-half-billion-dollars, 31 Km long collider that can reach energies of "500 gigaelectronvolts." Also, it seems, that they might consider...
  22. S

    What do they expect from the Large Hadron Collider ?

    I've read here http://lhc.web.cern.ch/lhc/general/gen_info.htm about the LHC buing under construction at CERN and they say that it will collide protons and other ions at very high speeds , but they don't say what new particles are expected to appear ,or what theories do they expect to be...
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